| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Tabor | city | South Dakota | United States | 42.95 | -97.66 | 1669 | |
| Tacoma Park | city | South Dakota | United States | 45.54 | -98.25 | 1669 | |
| Tea | city | South Dakota | United States | 43.45 | -96.84 | 1669 | |
| Terraville | city | South Dakota | United States | 44.36 | -103.76 | 5137 | |
| Terry | city | South Dakota | United States | 44.33 | -103.82 | 5869 | |
| Teton | city | South Dakota | United States | 44.29 | -100.51 | 1669 | |
| Thatcher | city | South Dakota | United States | 45.02 | -100.93 | 2509 | |
| Thomas | city | South Dakota | United States | 44.76 | -97.21 | 1742 | |
| Thunder Butte | city | South Dakota | United States | 45.21 | -101.67 | 2040 | |
| Thunder Hawk | city | South Dakota | United States | 45.94 | -101.97 | 2598 | |
| Thunderbird Colony | city | South Dakota | United States | 45.19 | -99.27 | 1725 | |
| Thunderbird Homes Addition | city | South Dakota | United States | 44.12 | -103.47 | 4599 | |
| Tigerville | city | South Dakota | United States | 43.98 | -103.64 | 5452 | |
| Tilford | city | South Dakota | United States | 44.30 | -103.43 | 3595 | |
| Timber Lake | city | South Dakota | United States | 45.43 | -101.07 | 2509 | |
| Tinton | city | South Dakota | United States | 44.38 | -104.05 | 6000 | |
| Tolstoy | city | South Dakota | United States | 45.21 | -99.61 | 1899 | |
| Tomahawk | city | South Dakota | United States | 44.21 | -103.53 | 5029 | |
| Toronto | city | South Dakota | United States | 44.57 | -96.64 | 1988 | |
| Torvik Subdivision | city | South Dakota | United States | 45.66 | -97.08 | 1669 | |
| Trail City | city | South Dakota | United States | 45.47 | -100.73 | 2509 | |
| Trent | city | South Dakota | United States | 43.91 | -96.65 | 1669 | |
| Tripp | city | South Dakota | United States | 43.23 | -97.97 | 1669 | |
| Trojan | city | South Dakota | United States | 44.34 | -103.84 | 6197 | |
| Troy | city | South Dakota | United States | 45.04 | -96.87 | 1889 | |
| Tschetter Colony | city | South Dakota | United States | 43.37 | -97.69 | 1249 | |
| Tulare | city | South Dakota | United States | 44.74 | -98.51 | 1669 | |
| Tunerville | city | South Dakota | United States | 44.89 | -96.68 | 1709 | |
| Turkey Ridge | city | South Dakota | United States | 43.24 | -97.28 | 1669 | |
| Turton | city | South Dakota | United States | 45.05 | -98.10 | 1669 | |
| Tuthill | city | South Dakota | United States | 43.16 | -101.49 | 3349 | |
| Twilight Hills Addition | city | South Dakota | United States | 44.08 | -103.15 | 3349 | |
| Twin Brooks | city | South Dakota | United States | 45.21 | -96.78 | 1249 | |
| Two Strike | city | South Dakota | United States | 43.21 | -100.88 | 2785 | |
| Tyndall | city | South Dakota | United States | 42.99 | -97.86 | 1669 |